Two years into her marriage, Azusa still deeply desires intimacy with her husband, Hirokazu. However, Hirokazu spends every day off enjoying baseball, leaving little time for Azusa. His personality prioritizes hobbies over romance, leaving her emotionally and physically unfulfilled. While Azusa tries to satisfy her sexual needs through masturbation, she remains unsatisfied. One day, she realizes that Hirokazu's friends, Shino and Yamaguchi, are often the ones taking him out. As an apology, Azusa visits Shino's home. By chance, she discovers that Shino is attracted to women just like her, sparking a secret plan. Later, Azusa invites Shino to her house, determined to begin a new, intimate relationship.